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Developed by three Danish mechanical engineers, the idea was
funded by social funding website Kickstarter and are now being sold on Amazon.

The makers say wearing the glasses for up to 30 minutes a
day will mean 'you'll have much more energy during those long, dark winter
months'.

The glasses are powered by two AAA batteries, and the firm admits that wearers look rather unique, warning potential purchasers: 'However, if you feel like Lady Gaga while wearing the glasses, that’s just a sign that you’re really lightening your mood.'

The £54 glasses are designed to be worn while you go about your morning routine as they do not obscure your field of vision.

Seasonal affected disorder (SAD) affects around one in 50 people in the UK.

The main symptoms are a persistent low mood and a marked loss of interests or pleasure in activities.

Fatigue, comfort eating and heavy limbs are other common symptoms.

The depression usually develop sometime between September and November and continue until March or April.

Light therapy (sitting in front of a special bright light for a time
each day) is an effective treatment in many cases.

The light source need
to be at least 2500 lux (about 10 times that of ordinary light bulbs).

Other options for treatment are the same as for other types of
depression.